Whose directorial debut earned him an Oscar for "Ordinary People" in 1980?

"Ordinary People" is a 1980 American drama film that marked the directorial debut of actor Robert Redford. The film stars Donald Sutherland, Mary Tyler Moore, Judd Hirsch, and Timothy Hutton.

The story concerns the disintegration of an upper-middle class family in Lake Forest, Illinois, following the death of one of their sons in a boating accident. The screenplay by Alvin Sargent was based upon the 1976 novel "Ordinary People" by Judith Guest.

Robert Redford and Timothy Hutton both won Academy Awards for their respective debuts: Redford as Best Director and Hutton, in his first film (he had previously appeared on television), as Best Supporting Actor. The film marked Mary Tyler Moore's career breakout from the personality of her other two famous roles as Laura Petrie on "The Dick Van Dyke Show" and Mary Richards on "The Mary Tyler Moore Show". Moore's complex performance was well-received and obtained a nomination for Best Actress. The film also won Best Picture for 1980. Judd Hirsch's portrayal of Dr. Berger was likewise a departure from his work on the sitcom "Taxi", and drew praise from many in the psychiatric community as one of the rare times their profession is shown in a positive light in film.

The film was a box office success, grossing $54 million in theaters and $23 million in rentals.